Mobile device and optical imaging lens thereof

ABSTRACT

Present embodiments provide for a mobile device and an optical imaging lens thereof. The optical imaging lens comprises an aperture stop and six lens elements positioned sequentially from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements and designing parameters satisfying at least one inequality, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

INCORPORATION BY REFERENCE

This application claims priority from P.R.C. Patent Application No.201410319838.7, filed on Jul. 7, 2014, the contents of which are herebyincorporated by reference in their entirety for all purposes.

TECHNICAL FIELD

The present invention relates to a mobile device and an optical imaginglens thereof, and particularly, relates to a mobile device applying anoptical imaging lens having six lens elements and an optical imaginglens thereof.

BACKGROUND

The ever-increasing demand for smaller sized mobile devices, such ascell phones, digital cameras, etc. correspondingly triggered a growingneed for a smaller sized photography module, comprising elements such asan optical imaging lens, a module housing unit, and an image sensor,etc., contained therein. Size reductions may be contributed from variousaspects of the mobile devices, which includes not only the chargecoupled device (CCD) and the complementary metal-oxide semiconductor(CMOS), but also the optical imaging lens mounted therein. When reducingthe size of the optical imaging lens, however, achieving good opticalcharacteristics becomes a challenging problem.

The length of conventional optical imaging lenses comprising four lenselements can be limited in a certain range; however, as the more andmore demands in the market for high-end products, high-standard opticalimaging lenses which show great quality with more pixels are required.

The major structure of conventional optical imaging lenses is thosehaving four lens elements which length is short due to the few lenselements; however, those having six lens elements are getting welcome inthe market for its better imaging quality and more pixels which maysatisfy the requirements of high-end products. Sadly, according tocurrent technological development, such as the optical imaging lenses inU.S. Pat. Nos. 7,663,814 and 8,040,618, both of which disclosed anoptical imaging lens constructed with an optical imaging lens having sixlens elements, the length of the optical imaging lens, from theobject-side surface of the first lens element to the image plane,exceeds 21 mm. These optical imaging lenses are too long for smallersized mobile devices.

Therefore, there is needed to develop optical imaging lens which iscapable to place with six lens elements therein, with a shorter length,while also having good optical characteristics.

SUMMARY

An object of the present invention is to provide a mobile device and anoptical imaging lens thereof. With controlling the convex or concaveshape of the surfaces, the length of the optical imaging lens isshortened and meanwhile the good optical characteristics, and systemfunctionality are sustained.

In an exemplary embodiment, an optical imaging lens comprises,sequentially from an object side to an image side along an optical axis,an aperture stop, first, second, third, fourth, fifth and sixth lenselements, each of the first, second, third, fourth, fifth and sixth lenselements having refracting power, an object-side surface facing towardthe object side and an image-side surface facing toward the image sideand a central thickness defined along the optical axis.

In the specification, parameters used here are: the central thickness ofthe first lens element, represented by T1, an air gap between the firstlens element and the second lens element along the optical axis,represented by G12, the central thickness of the second lens element,represented by T2, an air gap between the second lens element and thethird lens element along the optical axis, represented by G23, thecentral thickness of the third lens element, represented by T3, an airgap between the third lens element and the fourth lens element along theoptical axis, represented by G34, the central thickness of the fourthlens element, represented by T4, an air gap between the fourth lenselement and the fifth lens element along the optical axis, representedby G45, the central thickness of the fifth lens element, represented byT5, an air gap between the fifth lens element and the sixth lens elementalong the optical axis, represented by G56, the central thickness of thesixth lens element, represented by T6, a distance between the image-sidesurface of the sixth lens element and the object-side surface of afiltering unit along the optical axis, represented by G6F, the centralthickness of the filtering unit along the optical axis, represented byTF, a distance between the image-side surface of the filtering unit andan image plane along the optical axis, represented by GFP, a focusinglength of the first lens element, represented by f1, a focusing lengthof the second lens element, represented by f2, a focusing length of thethird lens element, represented by f3, a focusing length of the fourthlens element, represented by f4, a focusing length of the fifth lenselement, represented by f5, a focusing length of the sixth lens element,represented by f6, the refracting index of the first lens element,represented by n1, the refracting index of the second lens element,represented by n2, the refracting index of the third lens element,represented by n3, the refracting index of the fourth lens element,represented by n4, the refracting index of the fifth lens element,represented by n5, the refracting index of the sixth lens element,represented by n6, an abbe number of the first lens element, representedby v1, an abbe number of the second lens element, represented by v2, anabbe number of the third lens element, represented by v3, an abbe numberof the fourth lens element, represented by v4, an abbe number of thefifth lens element, represented by v5, an abbe number of the sixth lenselement, represented by v6, an effective focal length of the opticalimaging lens, represented by EFL, a distance between the object-sidesurface of the first lens element and an image plane along the opticalaxis, represented by TTL, a sum of the central thicknesses of all sixlens elements, i.e. a sum of T1, T2, T3, T4, T5 and T6, represented byALT, a sum of all five air gaps from the first lens element to the sixthlens element along the optical axis, i.e. a sum of G12, G23, G34, G45and G56, represented by AAG, a back focal length of the optical imaginglens, which is defined as the distance from the image-side surface ofthe sixth lens element to the image plane along the optical axis, i.e. asum of G6F, TF and GFP, and represented by BFL.

In an aspect of the optical imaging lens of the present invention, thefirst lens element has positive refracting power, the image-side surfaceof the first lens comprises a convex portion in a vicinity of theoptical axis; the second lens is constructed by plastic material; theimage-side surface of the third lens element comprises a convex portionin a vicinity of the optical axis; the image-side surface of the fourthlens element comprises a convex portion in a vicinity of the opticalaxis; the object-side surface of the fifth lens element comprises aconcave portion in a vicinity of the optical axis; the image-sidesurface of the sixth lens element comprises a concave portion in avicinity of the optical axis, and the sixth lens element is constructedby plastic material, T4 and G45 satisfy the equation:T4/G45≦2.8  Equation (1).

the optical imaging lens comprises no other lenses having refractingpower beyond the six lens elements.

In another exemplary embodiment, other equation(s), such as thoserelating to the ratio among parameters could be taken intoconsideration. For example, T2 and T3 could be controlled to satisfy theequation as follows:T3/T2≦2.1  Equation (2); or

T4 and G56 could be controlled to satisfy the equation as follows:T4/G56≦9.1  Equation (3); or

ALT and G56 could be controlled to satisfy the equation as follows:ALT/G56≦90  Equation (4); or

T1 and G56 could be controlled to satisfy the equation as follows:T1/G56≦20.5  Equation (5); or

T3 and T6 could be controlled to satisfy the equation as follows:T3/T6≦1.22  Equation (6); or

T3, and G34 could be controlled to satisfy the equation as follows:T3/G34≦5.5  Equation (7); or

EFL and G56 could be controlled to satisfy the equation as follows:EFL/G56≦150  Equation (8); or

G23 and G56 could be controlled to satisfy the equation as follows:G23/G56≦10  Equation (9); or

T3 and G56 could be controlled to satisfy the equation as follows:T3/G56≦10  Equation (10); or

T1 and G34 could be controlled to satisfy the equation as follows:T1/G34≦5  Equation (11); or

G45 and T5 could be controlled to satisfy the equation as follows:G45/T5≦1.4  Equation (12); or

T4 and G34 could be controlled to satisfy the equation as follows:T4/G34≧2.8  Equation (13); or

BFL and T4 could be controlled to satisfy the equation as follows:BFL/T4≦5.5  Equation (14); or

T5 and G34 could be controlled to satisfy the equation as follows:T5/G34≦5  Equation (15); or

G23 and T2 could be controlled to satisfy the equation as follows:G23/T2≦1.24  Equation (16); or

G23 and G34 could be controlled to satisfy the equation as follows:G23/G34≧2.3  Equation (17); or

EFL and G34 could be controlled to satisfy the equation as follows:EFL/G34≦30  Equation (18); or

ALT and G34 could be controlled to satisfy the equation as follows:ALT/G34≦18  Equation (19).

Aforesaid exemplary embodiments are not limited and could be selectivelyincorporated in other embodiments described herein.

In some exemplary embodiments, more details about the convex or concavesurface structure could be incorporated for one specific lens element orbroadly for plural lens elements to enhance the control for the systemperformance and/or resolution. It is noted that the details listed herecould be incorporated in example embodiments if no inconsistency occurs.

In another exemplary embodiment, a mobile device comprising a housingand a photography module positioned in the housing is provided. Thephotography module comprises any of aforesaid example embodiments ofoptical imaging lens, a lens barrel, a module housing unit and an imagesensor. The lens barrel is for positioning the optical imaging lens, themodule housing unit is for positioning the lens barrel, and the imagesensor is positioned at the image side of the optical imaging lens.

Through controlling the convex or concave shape of the surfaces, themobile device and the optical imaging lens thereof in exemplaryembodiments achieve good optical characteristics and effectively shortenthe length of the optical imaging lens.

BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments will be more readily understood from the followingdetailed description when read in conjunction with the appended drawing,in which:

FIG. 1 is a cross-sectional view of one single lens element according tothe present disclosure;

FIG. 2 is a cross-sectional view of a first embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 3 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a first embodiment of the optical imaging lensaccording to the present disclosure;

FIG. 4 is a table of optical data for each lens element of a firstembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 5 is a table of aspherical data of a first embodiment of theoptical imaging lens according to the present disclosure;

FIG. 6 is a cross-sectional view of a second embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 7 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a second embodiment of the optical imaginglens according to the present disclosure;

FIG. 8 is a table of optical data for each lens element of the opticalimaging lens of a second embodiment of the present disclosure;

FIG. 9 is a table of aspherical data of a second embodiment of theoptical imaging lens according to the present disclosure;

FIG. 10 is a cross-sectional view of a third embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 11 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a third embodiment of the optical imaging lensaccording the present disclosure;

FIG. 12 is a table of optical data for each lens element of the opticalimaging lens of a third embodiment of the present disclosure;

FIG. 13 is a table of aspherical data of a third embodiment of theoptical imaging lens according to the present disclosure;

FIG. 14 is a cross-sectional view of a fourth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 15 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fourth embodiment of the optical imaginglens according the present disclosure;

FIG. 16 is a table of optical data for each lens element of the opticalimaging lens of a fourth embodiment of the present disclosure;

FIG. 17 is a table of aspherical data of a fourth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 18 is a cross-sectional view of a fifth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 19 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fifth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 20 is a table of optical data for each lens element of the opticalimaging lens of a fifth embodiment of the present disclosure;

FIG. 21 is a table of aspherical data of a fifth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 22 is a cross-sectional view of a sixth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 23 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a sixth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 24 is a table of optical data for each lens element of the opticalimaging lens of a sixth embodiment of the present disclosure;

FIG. 25 is a table of aspherical data of a sixth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 26 is a cross-sectional view of a seventh embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 27 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a seventh embodiment of the optical imaginglens according to the present disclosure;

FIG. 28 is a table of optical data for each lens element of a seventhembodiment of an optical imaging lens according to the presentdisclosure;

FIG. 29 is a table of aspherical data of a seventh embodiment of theoptical imaging lens according to the present disclosure;

FIG. 30 is a cross-sectional view of a eighth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 31 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a eighth embodiment of the optical imaginglens according to the present disclosure;

FIG. 32 is a table of optical data for each lens element of the opticalimaging lens of a eighth embodiment of the present disclosure;

FIG. 33 is a table of aspherical data of a eighth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 34 is a cross-sectional view of a ninth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 35 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a ninth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 36 is a table of optical data for each lens element of the opticalimaging lens of a ninth embodiment of the present disclosure;

FIG. 37 is a table of aspherical data of a ninth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 38 is a cross-sectional view of a tenth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 39 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a tenth embodiment of the optical imaging lensaccording the present disclosure;

FIG. 40 is a table of optical data for each lens element of the opticalimaging lens of a tenth embodiment of the present disclosure;

FIG. 41 is a table of aspherical data of a tenth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 42 is a cross-sectional view of a eleventh embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 43 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a eleventh embodiment of the optical imaginglens according the present disclosure;

FIG. 44 is a table of optical data for each lens element of the opticalimaging lens of a eleventh embodiment of the present disclosure;

FIG. 45 is a table of aspherical data of a eleventh embodiment of theoptical imaging lens according to the present disclosure;

FIG. 46 is a cross-sectional view of a twelfth embodiment of an opticalimaging lens having six lens elements according to the presentdisclosure;

FIG. 47 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a twelfth embodiment of the optical imaginglens according the present disclosure;

FIG. 48 is a table of optical data for each lens element of the opticalimaging lens of a twelfth embodiment of the present disclosure;

FIG. 49 is a table of aspherical data of a twelfth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 50 is a cross-sectional view of a thirteenth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 51 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a thirteenth embodiment of the optical imaginglens according the present disclosure;

FIG. 52 is a table of optical data for each lens element of the opticalimaging lens of a thirteenth embodiment of the present disclosure;

FIG. 53 is a table of aspherical data of a thirteenth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 54 is a cross-sectional view of a fourteenth embodiment of anoptical imaging lens having six lens elements according to the presentdisclosure;

FIG. 55 is a chart of longitudinal spherical aberration and other kindsof optical aberrations of a fourteenth embodiment of the optical imaginglens according the present disclosure;

FIG. 56 is a table of optical data for each lens element of the opticalimaging lens of a fourteenth embodiment of the present disclosure;

FIG. 57 is a table of aspherical data of a fourteenth embodiment of theoptical imaging lens according to the present disclosure;

FIG. 58 is a table for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of all fourteen example embodiments;

FIG. 59 is a structure of an example embodiment of a mobile device;

FIG. 60 is a partially enlarged view of the structure of another exampleembodiment of a mobile device.

DETAILED DESCRIPTION

For a more complete understanding of the present disclosure and itsadvantages, reference is now made to the following description taken inconjunction with the accompanying drawings, in which like referencenumbers indicate like features. Persons having ordinary skill in the artwill understand other varieties for implementing example embodiments,including those described herein. The drawings are not limited tospecific scale and similar reference numbers are used for representingsimilar elements. As used in the disclosures and the appended claims,the terms “example embodiment,” “exemplary embodiment,” and “presentembodiment” do not necessarily refer to a single embodiment, although itmay, and various example embodiments may be readily combined andinterchanged, without departing from the scope or spirit of the presentinvention. Furthermore, the terminology as used herein is for thepurpose of describing example embodiments only and is not intended to bea limitation of the invention. In this respect, as used herein, the term“in” may include “in” and “on”, and the terms “a”, “an” and “the” mayinclude singular and plural references. Furthermore, as used herein, theterm “by” may also mean “from”, depending on the context. Furthermore,as used herein, the term “if” may also mean “when” or “upon”, dependingon the context. Furthermore, as used herein, the words “and/or” mayrefer to and encompass any and all possible combinations of one or moreof the associated listed items.

Here in the present specification, “a lens element having positiverefracting power (or negative refracting power)” means that the lenselement has positive refracting power (or negative refracting power) inthe vicinity of the optical axis. “An object-side (or image-side)surface of a lens element comprises a convex (or concave) portion in aspecific region” means that the object-side (or image-side) surface ofthe lens element “protrudes outwardly (or depresses inwardly)” along thedirection parallel to the optical axis at the specific region, comparedwith the outer region radially adjacent to the specific region. TakingFIG. 1 for example, the lens element shown therein is radially symmetricaround the optical axis which is labeled by I. The object-side surfaceof the lens element comprises a convex portion at region A, a concaveportion at region B, and another convex portion at region C. This isbecause compared with the outer region radially adjacent to the region A(i.e. region B), the object-side surface protrudes outwardly at theregion A, compared with the region C, the object-side surface depressesinwardly at the region B, and compared with the region E, theobject-side surface protrudes outwardly at the region C. Here, “in avicinity of a periphery of a lens element” means that in a vicinity ofthe peripheral region of a surface for passing imaging light on the lenselement, i.e. the region C as shown in FIG. 1. The imaging lightcomprises chief ray Lc and marginal ray Lm. “In a vicinity of theoptical axis” means that in a vicinity of the optical axis of a surfacefor passing the imaging light on the lens element, i.e. the region A asshown in FIG. 1. Further, a lens element could comprise an extendingportion E for mounting the lens element in an optical imaging lens.Ideally, the imaging light would not pass the extending portion E. Herethe extending portion E is only for example, the structure and shapethereof are not limited to this specific example. Please also noted thatthe extending portion of all the lens elements in the exampleembodiments shown below are skipped for maintaining the drawings cleanand concise.

In the present invention, examples of an optical imaging lens which is aprime lens are provided. Example embodiments of an optical imaging lensmay comprise a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element and a sixth lenselement, each of the lens elements comprises refracting power, anobject-side surface facing toward an object side and an image-sidesurface facing toward an image side and a central thickness definedalong the optical axis. These lens elements may be arranged sequentiallyfrom the object side to the image side along an optical axis, andexample embodiments of the lens may comprise no other lenses havingrefracting power beyond the six lens elements. The design of the detailcharacteristics of each lens element can provide the improved imagingquality and short optical imaging lens.

In an example embodiment, the details of each lens element is describedbelow: the first lens element has positive refracting power, theimage-side surface of the first lens comprises a convex portion in avicinity of the optical axis; the second lens is constructed by plasticmaterial, the image-side surface of the third lens element comprises aconvex portion in a vicinity of the optical axis; the image-side surfaceof the fourth lens element comprises a convex portion in a vicinity ofthe optical axis; the object-side surface of the fifth lens elementcomprises a concave portion in a vicinity of the optical axis, theimage-side surface of the sixth lens element comprises a concave portionin a vicinity of the optical axis and is constructed by plasticmaterial, and T4/G45≦2.8. The optical imaging lens may comprise no otherlenses having refracting power beyond the six lens elements

Preferably, the lens elements are designed in light of the opticalcharacteristics and the length of the optical imaging lens. For example,combining the convex portion in a vicinity of the optical axis formed onthe image-side surface of the first lens element, the convex portion ina vicinity of the optical axis formed on the image-side surface of thethird lens element, the convex portion in a vicinity of the optical axisformed on the image-side surface of the fourth lens element, the concaveportion in a vicinity of the optical axis formed on the object-sidesurface of the fifth lens element, and the concave portion in a vicinityof the optical axis formed on the image-side surface of the sixth lenselement may assist in collecting light, the aberration of the opticalimaging lens could be adjusted to promote the imaging quality of theoptical imaging lens. Moreover, the plastic second and sixth lenselements are beneficial to reduce the cost and weight of the opticalimaging lens.

Further, if combining the convex portion in a vicinity of the opticalaxis formed on the object-side surface of the first lens element, theconvex portion in a vicinity of a periphery of the first lens elementformed on the object-side surface thereof, the convex portion in avicinity of a periphery of the first lens element formed on theimage-side surface thereof, the concave portion in a vicinity of theoptical axis formed on the object-side surface of the second lenselement, the concave portion in a vicinity of a periphery of the secondlens element formed on the object-side surface thereof, the concaveportion in a vicinity of the optical axis formed on the image-sidesurface thereof, the concave portion in a vicinity of the optical axisformed on the object-side surface of the third lens element, the concaveportion in a vicinity of the optical axis formed on the object-sidesurface of the fourth lens element, the concave portion in a vicinity ofa periphery of the fifth lens element formed on the object-side surfacethereof, the convex portion in a vicinity of the optical axis formed onthe image-side surface of the fifth lens element, the convex portion ina vicinity of a periphery of the fifth lens element formed on theimage-side surface thereof, the convex portion in a vicinity of theoptical axis formed on the object-side surface of the sixth lens elementand/or the convex portion in a vicinity of a periphery of the sixth lenselement formed on the image-side surface thereof, the imaging quality isimproved as the length of the optical imaging lens is shortened. Whenall lens elements are made by plastic material, the benefit of reducedproduction difficulty, cost and weight is enhanced.

In another exemplary embodiment, some equation(s) of parameters, such asthose relating to the ratio among parameters could be taken intoconsideration.

T2 and T3 could be controlled to satisfy the equation as follows:T3/T2≦2.1  Equation (2); or

T4 and G56 could be controlled to satisfy the equation as follows:T4/G56≦9.1  Equation (3); or

ALT and G56 could be controlled to satisfy the equation as follows:ALT/G56≦90  Equation (4); or

T1 and G56 could be controlled to satisfy the equation as follows:T1/G56≦20.5  Equation (5); or

T3 and T6 could be controlled to satisfy the equation as follows:T3/T6≦1.22  Equation (6); or

T3 and G34 could be controlled to satisfy the equation as follows:T3/G34≦5.5  Equation (7); or

EFL and G56 could be controlled to satisfy the equation as follows:EFL/G56≦150  Equation (8); or

G23 and G56 could be controlled to satisfy the equation as follows:G23/G56≦10  Equation (9); or

T3 and G56 could be controlled to satisfy the equation as follows:T3/G56≦10  Equation (10); or

T1 and G34 could be controlled to satisfy the equation as follows:T1/G34≦5  Equation (11); or

G45 and T5 could be controlled to satisfy the equation as follows:G45/T5≦1.4  Equation (12); or

T4 and G34 could be controlled to satisfy the equation as follows:T4/G34≦2.8  Equation (13); or

BFL and T4 could be controlled to satisfy the equation as follows:BFL/T4≦5.5  Equation (14); or

T5 and G34 could be controlled to satisfy the equation as follows:T5/G34≦5  Equation (15); or

G23 and T2 could be controlled to satisfy the equation as follows:G23/T2≦1.24  Equation (16); or

G23 and G34 could be controlled to satisfy the equation as follows:G23/G34≦2.3  Equation (17); or

EFL and G34 could be controlled to satisfy the equation as follows:EFL/G34≦30  Equation (18); or

ALT and G34 could be controlled to satisfy the equation as follows:ALT/G34≦18  Equation (19).

Aforesaid exemplary embodiments are not limited and could be selectivelyincorporated in other embodiments described herein.

The shapes in a vicinity of the optical axis and a periphery of a lenselement are varied in light of the light path to meet the requirementsof imaging quality and demanded length of the optical imaging lens.Therefore, the thicknesses in a vicinity of the optical axis and aperiphery of a lens element are different, and this makes the lightincident in a lens element the more far from the optical axis requiresfor a refraction angle with the more degrees to focus on the imagingplane. Moreover, the width of the air gap also affects imaging qualityof the optical imaging lens. Therefore, the shortening ratios of G34 andG56 are smaller than those of other parameters, and G34 and G56 could becontrolled to satisfy the equations as follows: T4/G56≦9.1, ALT/G56≦90,T1/G56≦20.5, T3/G34≦5.5, EFL/G56≦150, G23/G56≦10, T3/G56≦10, T1/G34≦5,T4/G34≦2.8, T5/G34≦5, G23/G34≦2.3, EFL/G34≦30, and ALT/G34≦18. Theimaging quality and manufacturing yield are improved as the length ofthe optical imaging lens is shortened.

Shortening the thickness of the lens, the air gap, and BFL can benefitto shorten the length of the optical image lens. However, if thethickness of the lens, the air gap, and BFL are too small, the assemblyand manufacture of the optical imaging lens become difficult. Besides,if T4, G45, T3, T2, T6, T5, BFL, G23 satisfying the equations asfollows: T4/G45≦2.8, T3/T2≦2.1, T3/T6≦1.22, G45/T5≦1.4, BFL/T4≦5.5,G23/T2≦1.24, the better arrangement for T2, T3, T4, T5, T6, G23, G45,BFL can be realized.

The numerators of these fractions (such as T3/T2 or T3/T6) having largevalue can't benefit to shorten the length of optical imaging lens, sothe ranges of the above equations (1)˜(19) could avoid the large valuesof numerators. When satisfying these equations (1)˜(19), the length ofoptical imaging lens can be shortened when the denominators of thesefractions are constant, and the aim of shortening the volume of theoptical lens can be realized. Furthermore, the ranges of these fractionscould be controlled to satisfy the equations as follows: 0.3≦T4/G45≦2.8,0.5≦T3/T2≦2.1, 0.1≦T4/G56≦9.1, 2.5≦ALT/G56≦90, 0.3≦T1/G56≦20.5,0.05≦T3/T6≦1.22, 0.3≦T3/G34≦5.5, 5.0≦EFL/G56≦150, 0.05≦G23/G56≦10,0.1≦T3/G56≦10, 0.8≦T1/G34≦5, 0.05≦G45/T5≦1.4, 0.3≦T4/G34≧2.8,2.5≦BFL/T4≦5.5, 0.3≦T5/G34≦5.0, 0.2≦G23/T2≦1.24, 0.05≦G23/G34≦2.3,9.0≦EFL/G34≦30, 5.0≦ALT/G34≦18, satisfying these equations listed abovemay benefit to promote the imaging quality.

In light of the unpredictability in an optical system, in the presentinvention, satisfying these equations listed above may preferablyshorten the length of the optical imaging lens, lowering the f-number,enlarging the shot angle, promoting the imaging quality and/orincreasing the yield in the assembly process.

When implementing example embodiments, more details about the convex orconcave surface could be incorporated for one specific lens element orbroadly for plural lens elements to enhance the control for the systemperformance and/or resolution. It is noted that the details listed herecould be incorporated in example embodiments if no inconsistency occurs.

Several exemplary embodiments and associated optical data will now beprovided for illustrating example embodiments of optical imaging lenswith good optical characteristics and a shortened length. Reference isnow made to FIGS. 2-5. FIG. 2 illustrates an example cross-sectionalview of an optical imaging lens 1 having six lens elements of theoptical imaging lens according to a first example embodiment. FIG. 3shows example charts of longitudinal spherical aberration and otherkinds of optical aberrations of the optical imaging lens 1 according toan example embodiment. FIG. 4 illustrates an example table of opticaldata of each lens element of the optical imaging lens 1 according to anexample embodiment, in which f is used for representing EFL. FIG. 5depicts an example table of aspherical data of the optical imaging lens1 according to an example embodiment.

As shown in FIG. 2, the optical imaging lens 1 of the present embodimentcomprises, in order from an object side A1 to an image side A2 along anoptical axis, an aperture stop 100, a first lens element 110, a secondlens element 120, a third lens element 130, a fourth lens element 140, afifth lens element 150 and a sixth lens element 160. A filtering unit170 and an image plane 180 of an image sensor are positioned at theimage side A2 of the optical lens 1. Each of the first, second, third,fourth, fifth, sixth lens elements 110, 120, 130, 140, 150, 160 and thefiltering unit 170 comprises an object-side surface111/121/131/141/151/161/171 facing toward the object side A1 and animage-side surface 112/122/132/142/152/162/172 facing toward the imageside A2. The example embodiment of the filtering unit 170 illustrated isan IR cut filter (infrared cut filter) positioned between the sixth lenselement 160 and an image plane 180. The filtering unit 170 selectivelyabsorbs light with specific wavelength from the light passing opticalimaging lens 1. For example, IR light is absorbed, and this willprohibit the IR light which is not seen by human eyes from producing animage on the image plane 180.

Please noted that during the normal operation of the optical imaginglens 1, the distance between any two adjacent lens elements of thefirst, second, third, fourth, fifth and sixth lens elements 110, 120,130, 140, 150, 160 is a unchanged value, i.e. the optical imaging lens 1is a prime lens.

Exemplary embodiments of each lens element of the optical imaging lens 1which may be constructed by plastic material will now be described withreference to the drawings.

An example embodiment of the first lens element 110 has positiverefracting power. The object-side surface 111 is a convex surfacecomprising a convex portion 1111 in a vicinity of the optical axis and aconvex portion 1112 in a vicinity of a periphery of the first lenselement 110. The image-side surface 112 is a convex surface comprising aconvex portion 1121 in a vicinity of the optical axis and a convexportion 1122 in a vicinity of the periphery of the first lens element110. The object-side surface 111 and the image-side surface 112 areaspherical surfaces.

An example embodiment of the second lens element 120 has negativerefracting power. The object-side surface 121 is a concave surfacecomprising a concave portion 1211 in a vicinity of the optical axis anda concave portion 1212 in a vicinity of a periphery of the second lenselement 120. The image-side surface 122 is a concave surface comprisinga concave portion 1221 in a vicinity of the optical axis and a concaveportion 1222 in a vicinity of the periphery of the second lens element120.

An example embodiment of the third lens element 130 has positiverefracting power. The object-side surface 131 comprises a concaveportion 1311 in a vicinity of the optical axis and a convex portion 1312in a vicinity of a periphery of the third lens element 130. Theimage-side surface 132 comprises a convex portion 1321 in a vicinity ofthe optical axis and a concave portion 1322 in a vicinity of theperiphery of the third lens element 130. The object-side surface 131 andthe image-side surface 132 are aspherical surfaces.

An example embodiment of the fourth lens element 140 has negativerefracting power. The object-side surface 141 comprises a concaveportion 1411 in a vicinity of the optical axis and a convex portion 1412in a vicinity of a periphery of the fourth lens element 140. Theimage-side surface 142 is a convex surface comprising a convex portion1421 in a vicinity of the optical axis and a convex portion 1422 in avicinity of the periphery of the fourth lens element 140. Theobject-side surface 141 and the image-side surface 142 are asphericalsurfaces.

An example embodiment of the fifth lens element 150 has positiverefracting power. The object-side surface 151 is a concave surfacecomprising a concave portion 1511 in a vicinity of the optical axis anda concave portion 1512 in a vicinity of a periphery of the fifth lenselement 150. The image-side surface 152 is a convex surface comprising aconvex portion 1521 in a vicinity of the optical axis and a convexportion 1522 in a vicinity of the periphery of the fifth lens element150. The object-side surface 151 and the image-side surface 152 areaspherical surfaces.

An example embodiment of the sixth lens element 160 has negativerefracting power. The object-side surface 161 is a concave surfacecomprising a concave portion 1611 in a vicinity of the optical axis anda concave portion 1612 in a vicinity of a periphery of the sixth lenselement 160. The image-side surface 162 comprise a concave portion 1621in a vicinity of the optical axis and a convex portion 1622 in avicinity of the periphery of the sixth lens element 160.

In example embodiments, air gaps exist between the lens elements 110,120, 130, 140, 150, 160, the filtering unit 170 and the image plane 180of the image sensor. For example, FIG. 1 illustrates the air gap d1existing between the first lens element 110 and the second lens element120, the air gap d2 existing between the second lens element 120 and thethird lens element 130, the air gap d3 existing between the third lenselement 130 and the fourth lens element 140, the air gap d4 existingbetween the fourth lens element 140 and the fifth lens element 150, theair gap d5 existing between the fifth lens element 150 and the sixthlens element 160, the air gap d6 existing between the sixth lens element160 and the filtering unit 170 and the air gap d7 existing between thefiltering unit 170 and the image plane 180 of the image sensor. However,in other embodiments, any of the aforesaid air gaps may or may notexist. For example, the profiles of opposite surfaces of any twoadjacent lens elements may correspond to each other, and in suchsituation, the air gap may not exist. The air gap d1 is denoted by G12,the air gap d2 is denoted by G23, the air gap d3 is denoted by G34, theair gap d4 is denoted by G45, the air gap d5 is denoted by G56 and thesum of d1, d2, d3, d4 and d5 is denoted by AAG.

FIG. 4 depicts the optical characteristics of each lens elements in theoptical imaging lens 1 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 111 of the first lens element110 to the image plane 180 along the optical axis is 5.860 mm, the imageheight is 2.95 mm. The length of the optical imaging lens 1 is shortenedcompared with conventional optical imaging lenses. Thus, the opticalimaging lens 1 is capable to provide excellent imaging quality forsmaller sized mobile devices.

Except the object-side surface 111 of the first lens element 110 is aspherical surface, the aspherical surfaces including the image-sidesurface 112 of the first lens element 110, the object-side surface 121and the image-side surface 122 of the second lens element 120, theobject-side surface 131 and the image-side surface 132 of the third lenselement 130, the object-side surface 141 and the image-side surface 142of the fourth lens element 140, the object-side surface 151 and theimage-side surface 152 of the fifth lens element 150, the object-sidesurface 161 and the image-side surface 162 of the sixth lens element 160are all defined by the following aspherical formula:

${Z(Y)} = {{\frac{Y^{2}}{R}/\left( {1 + \sqrt{1 - {\left( {1 + K} \right)\frac{Y^{2}}{R^{2}}}}} \right)} + {\sum\limits_{i = 1}^{n}{a_{2i} \times Y^{2i}}}}$

wherein,

R represents the radius of curvature of the surface of the lens element;

Z represents the depth of the aspherical surface (the perpendiculardistance between the point of the aspherical surface at a distance Yfrom the optical axis and the tangent plane of the vertex on the opticalaxis of the aspherical surface);

Y represents the perpendicular distance between the point of theaspherical surface and the optical axis;

K represents a conic constant;

a_(2i) represents an aspherical coefficient of 2i^(th) level.

The values of each aspherical parameter are shown in FIG. 5.

FIG. 3(a) shows the longitudinal spherical aberration, wherein thetransverse axis of FIG. 3(a) defines the focus, and the lengthwise axisof FIG. 3(a) defines the filed. From the vertical deviation of eachcurve shown in FIG. 3(a), the offset of the off-axis light relative tothe image point is within ±0.03 mm. Therefore, the first embodimentindeed improves the longitudinal spherical aberration with respect todifferent wavelengths. Furthermore, the curves of different wavelengthsare closed to each other, and this situation represents that off-axislight with respect to these wavelengths is focused around an imagepoint, and the aberration can be improved obviously.

FIGS. 3(b) and 3(c) respectively show the astigmatism aberration in thesagittal direction and astigmatism aberration in the tangentialdirection, wherein the transverse axis of FIG. 3(b) defines the focus,the lengthwise axis of FIG. 3(b) defines the image height, thetransverse axis of FIG. 3(c) defines the focus, the lengthwise axis ofFIG. 3(c) defines the image height, and the image height is 2.95 mm.Referring to FIG. 3(b), the focus variation with respect to the threedifferent wavelengths (470 nm, 555 nm, 650 nm) in the whole field fallswithin ±0.08 mm. Referring to FIG. 3(c), the focus variation withrespect to the three different wavelengths (470 nm, 555 nm, 650 nm) inthe whole field falls within ±0.06 mm. Therefore, the optical imaginglens 1 indeed eliminates aberration effectively. Additionally, the threecurves presenting different wavelengths are closed to each other, andthese closed curves represents that the dispersion is improved.

Please refer to FIG. 3(d), the transverse axis of FIG. 3(d) defines thepercentage, the lengthwise axis of FIG. 3(d) defines the image height,and the image height is 2.95 mm. The variation of the distortionaberration is within ±1.6%.

Therefore, the optical imaging lens 1 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 1 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 1is effectively shortened.

Reference is now made to FIGS. 6-9. FIG. 6 illustrates an examplecross-sectional view of an optical imaging lens 2 having six lenselements of the optical imaging lens according to a second exampleembodiment. FIG. 7 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 2 according to the second example embodiment. FIG. 8 shows anexample table of optical data of each lens element of the opticalimaging lens 2 according to the second example embodiment. FIG. 9 showsan example table of aspherical data of the optical imaging lens 2according to the second example embodiment. The reference numberslabeled in the present embodiment are similar to those in the firstembodiment for the similar elements, but here the reference numbers areinitialed with 2, for example, reference number 231 for labeling theobject-side surface of the third lens element 230, reference number 232for labeling the image-side surface of the third lens element 230, etc.

As shown in FIG. 6, the optical imaging lens 2 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 200, a first lens element210, a second lens element 220, a third lens element 230, a fourth lenselement 240, a fifth lens element 250 and a sixth lens element 260.

The differences between the second embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, the back focal length, the configuration ofthe positive/negative refracting power of the fourth lens element 240,and the configuration of the concave/convex shape of the object-sidesurfaces 241, but the configuration of the positive/negative refractingpower of the first, second, third, fifth and sixth lens elements 210,220, 230, 250, 260 and configuration of the concave/convex shape ofsurfaces comprising the object-side surfaces 211, 221, 231, 251, 261facing to the object side A1 and the image-side surfaces 212, 222, 232,242, 252, 262 facing to the image side A2 are similar to those in thefirst embodiment. Here, for clearly showing the drawings of the presentembodiment, only the surface shapes which are different from that in thefirst embodiment are labeled. Specifically, the fourth lens element 240has positive refracting power, and the object-side surface 241 of thefourth lens element 240 is a concave surface comprising a concaveportion 2411 in a vicinity of the optical axis and a concave portion2412 in a vicinity of a periphery of the fourth lens element 240.

Please refer to FIG. 8 for the optical characteristics of each lenselements in the optical imaging lens 2 the present embodiment, andplease refer to FIG. 58 for the values of T1, G12, T2, G23, T3, G34, T4,G45, T5, G56, T6, G6F, TF, GFP, EFL, AAG, ALT, BFL, TTL, EFL/T2, ALT/T4,AAG/T4, BFL/(G23+G34), BFL/T6, (G23+G34)/T4, AAG/(G23+G34), EFL/T5,T6/T4, BFL/T4, ALT/T6 and AAG/T6 of the present embodiment.

The distance from the object-side surface 211 of the first lens element210 to the image plane 280 along the optical axis is 5.229 mm and thelength of the length of the optical imaging lens 2 is shortened comparedwith conventional optical imaging lenses.

FIG. 7(a) shows the longitudinal spherical aberration. From the verticaldeviation of each curve shown in FIG. 7(a), the offset of the off-axislight relative to the image point is within ±0.05 mm. Furthermore, thethree curves having different wavelengths are closed to each other, andthis situation represents that off-axis light with respect to thesewavelengths is focused around an image point, and the aberration can beimproved obviously.

FIGS. 7(b) and 7(c) respectively show the astigmatism aberration in thesagittal direction and astigmatism aberration in the tangentialdirection, Referring to FIG. 7(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.08 mm. Referring to FIG. 7(c), the focus variationwith respect to the three different wavelengths (470 nm, 555 nm, 650 nm)in the whole field falls within ±0.05 mm. Additionally, the three curvespresenting different wavelengths are closed to each other, and theseclosed curves represents that the dispersion is improved.

Please refer to FIG. 7(d), the variation of the distortion aberration ofthe optical imaging lens 2 is within ±2.0%.

Therefore, the optical imaging lens 2 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 2 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 2is effectively shortened.

Reference is now made to FIGS. 10-13. FIG. 10 illustrates an examplecross-sectional view of an optical imaging lens 3 having six lenselements of the optical imaging lens according to a third exampleembodiment. FIG. 11 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 3 according to the third example embodiment. FIG. 12 shows anexample table of optical data of each lens element of the opticalimaging lens 3 according to the third example embodiment. FIG. 13 showsan example table of aspherical data of the optical imaging lens 3according to the third example embodiment. The reference numbers labeledin the present embodiment are similar to those in the first embodimentfor the similar elements, but here the reference numbers are initialedwith 3, for example, reference number 331 for labeling the object-sidesurface of the third lens element 330, reference number 332 for labelingthe image-side surface of the third lens element 330, etc.

As shown in FIG. 10, the optical imaging lens 3 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 300, a first lens element310, a second lens element 320, a third lens element 330, a fourth lenselement 340, a fifth lens element 350 and a sixth lens element 360.

The differences between the third embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, the back focal length, the configuration ofthe positive/negative refracting power of the fourth lens element 340and the configuration of the concave/convex shape of surfaces comprisingthe object-side surfaces 341, 361 and the image-side surface 322, butthe configuration of the positive/negative refracting power of thefirst, second, third, fifth and sixth lens elements 310, 320, 330, 350,360 and configuration of the concave/convex shape of surfaces comprisingthe object-side surfaces 311, 321, 331, 351 facing to the object side A1and the image-side surfaces 312, 332, 342, 352, 362 facing to the imageside A2, are similar to those in the first embodiment. Here, for clearlyshowing the drawings of the present embodiment, only the surface shapeswhich are different from that in the first embodiment are labeled.Specifically, the image-side surface 322 of the second lens element 320comprises a concave portion 3221 in a vicinity of the optical axis and aconvex portion 3222 in a vicinity of a periphery of the second lenselement 320; the fourth lens element 4 has positive refracting power andthe object-side surface 341 of the fourth lens element 340 is a concavesurface comprising a concave portion 3411 in a vicinity of the opticalaxis and a concave portion 3412 in a vicinity of a periphery of thefourth lens element 340; and the object-side surface 361 of the sixthlens element 360 comprises a concave portion 3611 in a vicinity of theoptical axis and a convex portion 3612 in a vicinity of a periphery ofthe sixth lens element 360.

FIG. 12 depicts the optical characteristics of each lens elements in theoptical imaging lens 3 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 311 of the first lens element310 to the image plane 380 along the optical axis is 5.219 mm and thelength of the optical imaging lens 3 is shortened compared withconventional optical imaging lenses.

FIG. 11(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 11(a), the offset of theoff-axis light relative to the image point is within ±0.03 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 11(b) and 11(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 11(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.1 mm. Referring to FIG. 11(c), the focus variationwith respect to the three different wavelengths (470 nm, 555 nm, 650 nm)in the whole field falls within ±0.06 mm. Additionally, the three curvespresenting different wavelengths are closed to each other, and theseclosed curves represents that the dispersion is improved.

Please refer to FIG. 11(d), the variation of the distortion aberrationof the optical imaging lens 4 is within ±2.5%.

Therefore, the optical imaging lens 3 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 3 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 3is effectively shortened.

Reference is now made to FIGS. 14-17. FIG. 14 illustrates an examplecross-sectional view of an optical imaging lens 4 having six lenselements of the optical imaging lens according to a fourth exampleembodiment. FIG. 15 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 4 according to the fourth embodiment. FIG. 16 shows an exampletable of optical data of each lens element of the optical imaging lens 4according to the fourth example embodiment. FIG. 17 shows an exampletable of aspherical data of the optical imaging lens 4 according to thefourth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 4, forexample, reference number 431 for labeling the object-side surface ofthe third lens element 430, reference number 432 for labeling theimage-side surface of the third lens element 430, etc.

As shown in FIG. 14, the optical imaging lens 4 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 400, a first lens element410, a second lens element 420, a third lens element 430, a fourth lenselement 440, a fifth lens element 450 and a sixth lens element 460.

The differences between the fourth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, back focal length, the configuration of thepositive/negative refracting power of the fourth lens element 440 andthe configuration of the concave/convex shape of the object-sidesurfaces 431, 441, 461 and the image-side surface 422, but theconfiguration of the positive/negative refracting power of the first,second, third, fifth and sixth lens elements 410, 420, 430, 450, 460 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 411, 421, 451 facing to the object side A1 and theimage-side surfaces 412, 432, 442, 452, 462 facing to the image side A2,are similar to those in the first embodiment. Here, for clearly showingthe drawings of the present embodiment, only the surface shapes whichare different from that in the first embodiment are labeled.Specifically, the image-side surface 422 of the second lens element 420comprises a concave portion 4221 in a vicinity of the optical axis and aconvex portion 4222 in a vicinity of a periphery of the second lenselement 420; the object-side surface 431 of the third lens element 430is a concave surface comprising a concave portion 4311 in a vicinity ofthe optical axis and a concave portion 4312 in a vicinity of a peripheryof the third lens element 430; the fourth lens element 440 has positiverefracting power; the object-side surface 441 of the fourth lens element440 is a concave surface comprising a concave portion 4411 in a vicinityof the optical axis and a concave portion 4412 in a vicinity of aperiphery of the fourth lens element 440; the object-side surface 461 ofthe sixth lens element 460 comprises a concave portion 4611 in avicinity of the optical axis and a convex portion 4612 in a vicinity ofa periphery of the sixth lens element 460.

FIG. 16 depicts the optical characteristics of each lens elements in theoptical imaging lens 4 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 411 of the first lens element410 to the image plane 480 along the optical axis is 5.198 mm and thelength of the optical imaging lens 4 is shortened compared withconventional optical imaging lenses.

FIG. 15(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 15(a), the offset of theoff-axis light relative to the image point is within ±0.05 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 15(b) and 15(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 15(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.1 mm. Referring to FIG. 15(c), the focus variationwith respect to the three different wavelengths (470 nm, 555 nm, 650 nm)in the whole field falls within ±0.16 mm. Additionally, the three curvespresenting different wavelengths are closed to each other, and theseclosed curves represents that the dispersion is improved.

Please refer to FIG. 15(d), the variation of the distortion aberrationof the optical imaging lens 4 is within ±1.2%.

Therefore, the optical imaging lens 4 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 4 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 4is effectively shortened.

Reference is now made to FIGS. 18-21. FIG. 18 illustrates an examplecross-sectional view of an optical imaging lens 5 having six lenselements of the optical imaging lens according to a fifth exampleembodiment. FIG. 19 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 5 according to the fifth embodiment. FIG. 20 shows an example tableof optical data of each lens element of the optical imaging lens 5according to the fifth example embodiment. FIG. 21 shows an exampletable of aspherical data of the optical imaging lens 5 according to thefifth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 5, forexample, reference number 531 for labeling the object-side surface ofthe third lens element 530, reference number 532 for labeling theimage-side surface of the third lens element 530, etc.

As shown in FIG. 18, the optical imaging lens 5 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 500, a first lens element510, a second lens element 520, a third lens element 530, a fourth lenselement 540, a fifth lens element 550 and a sixth lens element 560.

The differences between the fifth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, and back focal length, the configuration ofthe positive/negative refracting power of the fourth lens element 540,and configuration of the concave/convex shape of the object-sidesurfaces 541, 561 and the image-side surface 522. But the configurationof the positive/negative refracting power of the first, second, third,fifth and sixth lens elements 510, 520, 530, 550, 560 and configurationof the concave/convex shape of surfaces comprising the object-sidesurfaces 511, 521, 531, 551 facing to the object side A1 and theimage-side surfaces 512, 532, 542, 552, 562 facing to the image side A2,are similar to those in the first embodiment. Here, for clearly showingthe drawings of the present embodiment, only the surface shapes whichare different from that in the first embodiment are labeled.Specifically, the image-side surface 522 of the second lens element 520comprises a concave portion 5221 in a vicinity of the optical axis and aconvex portion 5222 in a vicinity of a periphery of the second lenselement 520; the fourth lens element 540 has positive refracting power;the object-side surface 541 of the fourth lens element 540 is a concavesurface comprising a concave portion 5411 in a vicinity of the opticalaxis and a concave portion 5412 in a vicinity of a periphery of thefourth lens element 540; the object-side surface 561 of the sixth lenselement 560 is a comprises a concave portion 5611 in a vicinity of theoptical axis and a convex portion 5612 in a vicinity of a periphery ofthe sixth lens element 560;

FIG. 20 depicts the optical characteristics of each lens elements in theoptical imaging lens 5 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 511 of the first lens element510 to the image plane 580 along the optical axis is 5.486 mm and thelength of the optical imaging lens 5 is shortened compared withconventional optical imaging lenses and even with the optical imaginglens 5 of the first embodiment. Thus, the optical imaging lens 5 iscapable to provide excellent imaging quality for smaller sized mobiledevices.

FIG. 19(a) shows the longitudinal spherical aberration of the firstembodiment. From the vertical deviation of each curve shown in FIG.19(a), the offset of the off-axis light relative to the image point iswithin ±0.025 mm. Furthermore, the three curves having differentwavelengths are closed to each other, and this situation represents thatoff-axis light with respect to these wavelengths is focused around animage point, and the aberration can be improved obviously.

FIGS. 19(b) and 19(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 19(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.12 mm. Referring to FIG. 19(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.1 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 19(d), the variation of the distortion aberrationof the optical imaging lens 5 is within ±2.5%.

Therefore, the optical imaging lens 5 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 5 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 5is effectively shortened.

Reference is now made to FIGS. 22-25. FIG. 22 illustrates an examplecross-sectional view of an optical imaging lens 6 having six lenselements of the optical imaging lens according to a sixth exampleembodiment. FIG. 23 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 6 according to the sixth embodiment. FIG. 24 shows an example tableof optical data of each lens element of the optical imaging lens 6according to the sixth example embodiment. FIG. 25 shows an exampletable of aspherical data of the optical imaging lens 6 according to thesixth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 6, forexample, reference number 631 for labeling the object-side surface ofthe third lens element 630, reference number 632 for labeling theimage-side surface of the third lens element 630, etc.

As shown in FIG. 22, the optical imaging lens 6 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 600, a first lens element610, a second lens element 620, a third lens element 630, a fourth lenselement 640, a fifth lens element 650 and a sixth lens element 660. Thedifferences between the sixth embodiment and the first embodiment arethe radius of curvature and thickness of each lens element, the distanceof each air gap, back focal length, and the configuration of theconcave/convex shape of the object-side surface 641, but theconfiguration of the positive/negative refracting power of the first,second, third, fourth, fifth and sixth lens elements 610, 620, 630, 640,650, 660 and configuration of the concave/convex shape of surfaces,comprising the object-side surfaces 611, 621, 631, 651, 661 facing tothe object side A1 and the image-side surfaces 612, 622, 632, 642, 652,662 facing to the image side A2, are similar to those in the firstembodiment. Here, for clearly showing the drawings of the presentembodiment, only the surface shapes which are different from that in thefirst embodiment are labeled. Specifically, the object-side surface 641of the fourth lens element 640 is a concave surface comprising a concaveportion 6411 in a vicinity of the optical axis and a concave portion6412 in a vicinity of a periphery of the fourth lens element 640.

FIG. 24 depicts the optical characteristics of each lens elements in theoptical imaging lens 6 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 611 of the first lens element610 to the image plane 680 along the optical axis is 5.488 mm and thelength of the optical imaging lens 6 is shortened compared withconventional optical imaging lenses. Thus, the optical imaging lens 6 iscapable to provide excellent imaging quality for smaller sized mobiledevices.

FIG. 23(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 23(a), the offset of theoff-axis light relative to the image point is within ±0.04 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 23(b) and 23(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 23(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.04 mm. Referring to FIG. 23(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.1 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 23(d), the variation of the distortion aberrationof the optical imaging lens 6 is within ±1.2%.

Therefore, the optical imaging lens 6 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 6 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 6is effectively shortened.

Reference is now made to FIGS. 26-29. FIG. 26 illustrates an examplecross-sectional view of an optical imaging lens 7 having six lenselements of the optical imaging lens according to a seventh exampleembodiment. FIG. 27 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 7 according to the seventh embodiment. FIG. 28 shows an exampletable of optical data of each lens element of the optical imaging lens 7according to the seventh example embodiment. FIG. 29 shows an exampletable of aspherical data of the optical imaging lens 7 according to theseventh example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 7, forexample, reference number 731 for labeling the object-side surface ofthe third lens element 730, reference number 732 for labeling theimage-side surface of the third lens element 730, etc.

As shown in FIG. 26, the optical imaging lens 7 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 700, a first lens element710, a second lens element 720, a third lens element 730, a fourth lenselement 740, a fifth lens element 750 and a sixth lens element 760.

The differences between the seventh embodiment and the first embodimentare the radius of curvature, thickness of each lens element, thedistance of each air gap, back focal length, and the configuration ofthe concave/convex shape of the object-side surfaces 741 and theimage-side surfaces 722, 742, but the configuration of thepositive/negative refracting power of the first, second, third, fourthfifth, and sixth lens elements 710, 720, 730, 740, 750, 760 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 711, 721, 731, 751, 761 facing to the object sideA1 and the image-side surfaces 712, 732, 752, 762 facing to the imageside A2, are similar to those in the first embodiment. Here, for clearlyshowing the drawings of the present embodiment, only the surface shapeswhich are different from that in the first embodiment are labeled.Specifically, the image-side surface 722 of the second lens element 720comprises a concave portion 7221 in a vicinity of the optical axis and aconvex portion 7222 in a vicinity of a periphery of the second lenselement 720; the object-side surface 741 of the fourth lens element 740is a concave surface comprising a concave portion 7411 in a vicinity ofthe optical axis and a concave portion 7412 in a vicinity of a peripheryof the fourth lens element 740; the image-side surface 742 of the fourthlens element 740 comprises a convex portion 7412 in a vicinity of theoptical axis and a concave portion 7422 in a vicinity of a periphery ofthe fourth lens element 740.

FIG. 28 depicts the optical characteristics of each lens elements in theoptical imaging lens 1 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 711 of the first lens element710 to the image plane 780 along the optical axis is 5.788 mm and thelength of the optical imaging lens 7 is shortened compared withconventional optical imaging lenses.

FIG. 27(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 27(a), the offset of theoff-axis light relative to the image point is within ±0.008 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 27(b) and 27(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 27(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.025 mm. Referring to FIG. 27(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.06 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 27(d), the variation of the distortion aberrationof the optical imaging lens 7 is within ±0.75%.

Therefore, the optical imaging lens 7 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 7 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 7is effectively shortened.

Reference is now made to FIGS. 30-33. FIG. 30 illustrates an examplecross-sectional view of an optical imaging lens 8 having six lenselements of the optical imaging lens according to a eighth exampleembodiment. FIG. 31 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 8 according to the eighth embodiment. FIG. 32 shows an exampletable of optical data of each lens element of the optical imaging lens 8according to the eighth example embodiment. FIG. 33 shows an exampletable of aspherical data of the optical imaging lens 8 according to theeighth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 8, forexample, reference number 831 for labeling the object-side surface ofthe third lens element 830, reference number 832 for labeling theimage-side surface of the third lens element 830, etc.

As shown in FIG. 30, the optical imaging lens 8 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 800, a first lens element810, a second lens element 820, a third lens element 830, a fourth lenselement 840, a fifth lens element 850 and a sixth lens element 860.

The differences between the eighth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, back focal length, and the configuration ofthe concave/convex shape of the object-side surface 831 and image-sidesurfaces 822, 842, but the configuration of the positive/negativerefracting power of the first, second, third, fourth fifth and sixthlens elements 810, 820, 830, 840, 850, 860 and configuration of theconcave/convex shape of surfaces, comprising the object-side surfaces811, 821, 841, 851, 861 facing to the object side A1 and the image-sidesurfaces 812, 832, 852, 862 facing to the image side A2, are similar tothose in the first embodiment. Here, for clearly showing the drawings ofthe present embodiment, only the surface shapes which are different fromthat in the first embodiment are labeled. Specifically, the image-sidesurface 822 of the second lens element 820 comprises a concave portion8221 in a vicinity of the optical axis and a convex portion 8222 in avicinity of a periphery of the second lens element 820, the object-sidesurface 831 of the third lens element 830 is a concave surfacecomprising a concave portion 8311 in a vicinity of the optical axis anda concave portion 8312 in a vicinity of a periphery of the third lenselement 830; the image-side surface 842 of the fourth lens element 840comprises a convex portion 8421 in a vicinity of the optical axis and aconcave portion 8422 in a vicinity of a periphery of the fourth lenselement 840.

FIG. 32 depicts the optical characteristics of each lens elements in theoptical imaging lens 8 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 811 of the first lens element810 to the image plane 880 along the optical axis is 5.878 mm and thelength of the optical imaging lens 8 is shortened compared withconventional optical imaging lenses. Thus, the optical imaging lens 8 iscapable to provide excellent imaging quality for smaller sized mobiledevices.

FIG. 31(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 31(a), the offset of theoff-axis light relative to the image point is within ±0.0085 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 31(b) and 31(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 31(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.02 mm. Referring to FIG. 31(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.05 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 31(d), the variation of the distortion aberrationof the optical imaging lens 8 is within ±0.7%.

Therefore, the optical imaging lens 8 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 8 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 8is effectively shortened.

Reference is now made to FIGS. 34-37. FIG. 34 illustrates an examplecross-sectional view of an optical imaging lens 9 having six lenselements of the optical imaging lens according to a ninth exampleembodiment. FIG. 35 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 9 according to the ninth embodiment. FIG. 36 shows an example tableof optical data of each lens element of the optical imaging lens 9according to the ninth example embodiment. FIG. 37 shows an exampletable of aspherical data of the optical imaging lens 9 according to theninth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 9, forexample, reference number 931 for labeling the object-side surface ofthe third lens element 930, reference number 932 for labeling theimage-side surface of the third lens element 930, etc.

As shown in FIG. 34, the optical imaging lens 9 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 900, a first lens element910, a second lens element 920, a third lens element 930, a fourth lenselement 940, a fifth lens element 950 and a sixth lens element 960.

The differences between the ninth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, back focal length, and the configuration ofthe concave/convex shape of the image-side surface 942, but theconfiguration of the positive/negative refracting power of the first,second, third, fourth, fifth, sixth lens elements 910, 920, 930, 940,950, 960 and configuration of the concave/convex shape of surfaces,comprising the object-side surfaces 911, 921, 931, 941, 951, 961 facingto the object side A1 and the image-side surfaces 912, 922, 932, 952,962 facing to the image side A2, are similar to those in the firstembodiment. Here, for clearly showing the drawings of the presentembodiment, only the surface shapes which are different from that in thefirst embodiment are labeled. Specifically, the image-side surface 942of the fourth lens element 940 comprises a convex portion 9421 in avicinity of the optical axis and a concave portion 9422 in a vicinity ofa periphery of the fourth lens element 940.

FIG. 36 depicts the optical characteristics of each lens elements in theoptical imaging lens 9 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 911 of the first lens element910 to the image plane 980 along the optical axis is 5.783 mm and thelength of the optical imaging lens 9 is shortened compared withconventional optical imaging lenses. Thus, the optical imaging lens 9 iscapable to provide excellent imaging quality for smaller sized mobiledevices.

FIG. 35(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 35(a), the offset of theoff-axis light relative to the image point is within ±0.02 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 35(b) and 35(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 35(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.04 mm. Referring to FIG. 35(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.07 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 35(d), the variation of the distortion aberrationof the optical imaging lens 9 is within ±1.2%.

Therefore, the optical imaging lens 9 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 9 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 9is effectively shortened.

Reference is now made to FIGS. 38-41. FIG. 38 illustrates an examplecross-sectional view of an optical imaging lens 10 having six lenselements of the optical imaging lens according to a tenth exampleembodiment. FIG. 39 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 10 according to the tenth embodiment. FIG. 40 shows an exampletable of optical data of each lens element of the optical imaging lens10 according to the tenth example embodiment. FIG. 41 shows an exampletable of aspherical data of the optical imaging lens 10 according to thetenth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 10, forexample, reference number 1031 for labeling the object-side surface ofthe third lens element 1030, reference number 1032 for labeling theimage-side surface of the third lens element 1030, etc.

As shown in FIG. 38, the optical imaging lens 10 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 1000, a first lens element1010, a second lens element 1020, a third lens element 1030, a fourthlens element 1040, a fifth lens element 1050 and a sixth lens element1060.

The differences between the tenth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, back focal length, and the configuration ofthe concave/convex shape of the object-side surfaces 1031, 1041 and theimage-side surfaces 1032, 1042, but the configuration of thepositive/negative refracting power of the first, second, third, fourth,fifth and sixth lens elements 1010, 1020, 1030, 1040, 1050, 1060 andconfiguration of the concave/convex shape of surfaces, comprising theobject-side surfaces 1011, 1021, 1051, 1061 facing to the object side A1and the image-side surfaces 1012, 1022, 1052, 1062 facing to the imageside A2, are similar to those in the first embodiment. Here, for clearlyshowing the drawings of the present embodiment, only the surface shapeswhich are different from that in the first embodiment are labeled.Specifically, the object-side surface 1031 of the third lens element1030 is a concave surface comprising a concave portion 103111 in avicinity of the optical axis and a concave portion 10312 in a vicinityof a periphery of the third lens element 1030; the image-side surface1032 of the third lens element 1030 is a convex surface comprising aconvex portion 10321 in a vicinity of the optical axis and a convexportion 10322 in a vicinity of a periphery of the third lens element1030; the object-side surface 1041 of the fourth lens element 1040 is aconcave surface comprising a concave portion 10411 in a vicinity of theoptical axis and a concave portion 10412 in a vicinity of a periphery ofthe fourth lens element 1040; the image-side surface 1042 of the fourthlens element 1040 comprises a convex portion 10421 in a vicinity of theoptical axis and a concave portion 10422 in a vicinity of a periphery ofthe fourth lens element 1040.

FIG. 40 depicts the optical characteristics of each lens elements in theoptical imaging lens 10 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 1011 of the first lens element1010 to the image plane 1080 along the optical axis is 5.879 mm and thelength of the optical imaging lens 10 is shortened compared withconventional optical imaging lenses. Thus, the optical imaging lens 10is capable to provide excellent imaging quality for smaller sized mobiledevices.

FIG. 39(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 39(a), the offset of theoff-axis light relative to the image point is within ±0.008 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 39(b) and 39(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 39(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.03 mm. Referring to FIG. 39(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.05 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 39(d), the variation of the distortion aberrationof the optical imaging lens 10 is within ±0.7%.

Therefore, the optical imaging lens 10 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 10 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 10is effectively shortened.

Reference is now made to FIGS. 42-45. FIG. 42 illustrates an examplecross-sectional view of an optical imaging lens 11 having six lenselements of the optical imaging lens according to a eleventh exampleembodiment. FIG. 43 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 11 according to the eleventh embodiment. FIG. 44 shows an exampletable of optical data of each lens element of the optical imaging lens11 according to the eleventh example embodiment. FIG. 45 shows anexample table of aspherical data of the optical imaging lens 11according to the eleventh example embodiment. The reference numberslabeled in the present embodiment are similar to those in the firstembodiment for the similar elements, but here the reference numbers areinitialed with 11, for example, reference number 1131 for labeling theobject-side surface of the third lens element 1130, reference number1132 for labeling the image-side surface of the third lens element 1130,etc.

As shown in FIG. 42, the optical imaging lens 11 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 1100, a first lens element1110, a second lens element 1120, a third lens element 1130, a fourthlens element 1140, a fifth lens element 1150 and a sixth lens element1160.

The differences between the eleventh embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, back focal length, and the configuration ofthe concave/convex shape of the object-side surface 1141 and image-sidesurface 1142, but the configuration of the positive/negative refractingpower of the first, second, third, fourth, fifth and sixth lens elements1110, 1120, 1130, 1140, 1150, 1160 and configuration of theconcave/convex shape of surfaces, comprising the object-side surfaces1111, 1121, 1131, 1151, 1161 facing to the object side A1 and theimage-side surfaces 1112, 1122, 1132, 1152, 1162 facing to the imageside A2, are similar to those in the first embodiment. Here, for clearlyshowing the drawings of the present embodiment, only the surface shapeswhich are different from that in the first embodiment are labeled.Specifically, the object-side surface 1141 of the fourth lens element1140 is a concave surface comprising a concave portion 11411 in avicinity of the optical axis and a concave portion 11412 in a vicinityof a periphery of the fourth lens element 1140; the image-side surface1142 of the fourth lens element 1140 comprises a convex portion 11421 ina vicinity of the optical axis and a concave portion 11422 in a vicinityof a periphery of the fourth lens element 1140.

FIG. 44 depicts the optical characteristics of each lens elements in theoptical imaging lens 11 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 1111 of the first lens element1110 to the image plane 1180 along the optical axis is 5.850 mm and thelength of the optical imaging lens 11 is shortened compared withconventional optical imaging lenses.

FIG. 43(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 43(a), the offset of theoff-axis light relative to the image point is within ±0.01 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 43(b) and 43(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 43(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.03 mm. Referring to FIG. 43(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.06 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 43(d), the variation of the distortion aberrationof the optical imaging lens 11 is within ±0.9%.

Therefore, the optical imaging lens 11 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 11 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 11is effectively shortened.

Reference is now made to FIGS. 46-49. FIG. 46 illustrates an examplecross-sectional view of an optical imaging lens 12 having six lenselements of the optical imaging lens according to a twelfth exampleembodiment. FIG. 47 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 12 according to the twelfth embodiment. FIG. 48 shows an exampletable of optical data of each lens element of the optical imaging lens12 according to the twelfth example embodiment. FIG. 49 shows an exampletable of aspherical data of the optical imaging lens 12 according to thetwelfth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 12, forexample, reference number 1231 for labeling the object-side surface ofthe third lens element 1230, reference number 1232 for labeling theimage-side surface of the third lens element 1230, etc.

As shown in FIG. 46, the optical imaging lens 12 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 1200, a first lens element1210, a second lens element 1220, a third lens element 1230, a fourthlens element 1240, a fifth lens element 1250 and a sixth lens element1260.

The differences between the twelfth embodiment and the first embodimentare the radius of curvature and thickness of each lens element, thedistance of each air gap, back focal length, and the configuration ofthe concave/convex shape of the image-side surfaces 1232, 1242, but theconfiguration of the positive/negative refracting power of the first,second, third, fourth, fifth and sixth lens elements 1210, 1220, 1230,1240, 1250, 1260 and configuration of the concave/convex shape ofsurfaces, comprising the object-side surfaces 1211, 1221, 1231, 1241,1251, 1261 facing to the object side A1 and the image-side surfaces1212, 1222, 1252, 1262 facing to the image side A2, are similar to thosein the first embodiment. Here, for clearly showing the drawings of thepresent embodiment, only the surface shapes which are different fromthat in the first embodiment are labeled. Specifically, the image-sidesurface 1232 of the third lens element 1230 is a convex surfacecomprising a convex portion 12321 in a vicinity of the optical axis anda convex portion 12322 in a vicinity of a periphery of the third lenselement 1230; the image-side surface 1242 of the fourth lens element1240 comprises a convex portion 12421 in a vicinity of the optical axisand a concave portion 12422 in a vicinity of a periphery of the fourthlens element 1240.

FIG. 48 depicts the optical characteristics of each lens elements in theoptical imaging lens 12 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 1211 of the first lens element1210 to the image plane 1280 along the optical axis is 5.560 mm and thelength of the optical imaging lens 12 is shortened compared withconventional optical imaging lenses. Thus, the optical imaging lens 12is capable to provide excellent imaging quality for smaller sized mobiledevices.

FIG. 47(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 47(a), the offset of theoff-axis light relative to the image point is within ±0.02 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 47(b) and 47(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 47(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.04 mm. Referring to FIG. 47(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.08 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 47(d), the variation of the distortion aberrationof the optical imaging lens 12 is within +1.5%.

Therefore, the optical imaging lens 12 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 12 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 12is effectively shortened.

Reference is now made to FIGS. 50-53. FIG. 50 illustrates an examplecross-sectional view of an optical imaging lens 13 having six lenselements of the optical imaging lens according to a thirteenth exampleembodiment. FIG. 51 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 13 according to the thirteenth embodiment. FIG. 52 shows an exampletable of optical data of each lens element of the optical imaging lens13 according to the twelfth example embodiment. FIG. 53 shows an exampletable of aspherical data of the optical imaging lens 13 according to thetwelfth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 13, forexample, reference number 1331 for labeling the object-side surface ofthe third lens element 1330, reference number 1332 for labeling theimage-side surface of the third lens element 1330, etc.

As shown in FIG. 50, the optical imaging lens 13 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 1300, a first lens element1310, a second lens element 1320, a third lens element 1330, a fourthlens element 1340, a fifth lens element 1350 and a sixth lens element1360.

The differences between the thirteenth embodiment and the firstembodiment are the radius of curvature and thickness of each lenselement, the distance of each air gap, back focal length, theconfiguration of the positive/negative refracting power of the fourthlens element 1340, and the configuration of the concave/convex shape ofthe object-side surface 1361 and the image-side surface 1332, but theconfiguration of the positive/negative refracting power of the first,second, third, fifth and sixth lens elements 1310, 1320, 1330, 1350,1360 and configuration of the concave/convex shape of surfaces,comprising the object-side surfaces 1311, 1321, 1331, 1341, 1351 facingto the object side A1 and the image-side surfaces 1312, 1322, 1342,1352, 1362 facing to the image side A2, are similar to those in thefirst embodiment. Here, for clearly showing the drawings of the presentembodiment, only the surface shapes which are different from that in thefirst embodiment are labeled. Specifically, the fourth lens element 1340has positive refracting power, the image-side surface 1332 of the thirdlens element 1330 is a convex surface comprising a convex portion 13321in a vicinity of the optical axis and a convex portion 13322 in avicinity of a periphery of the third lens element 1330; the object-sidesurface 1361 of the sixth lens element 1360 comprises a concave portion13611 in a vicinity of the optical axis and a convex portion 13612 in avicinity of a periphery of the sixth lens element 1340.

FIG. 52 depicts the optical characteristics of each lens elements in theoptical imaging lens 13 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 1311 of the first lens element1310 to the image plane 1380 along the optical axis is 5.677 mm and thelength of the optical imaging lens 13 is shortened compared withconventional optical imaging lenses. Thus, the optical imaging lens 13is capable to provide excellent imaging quality for smaller sized mobiledevices.

FIG. 51(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 51(a), the offset of theoff-axis light relative to the image point is within ±0.02 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 51(b) and 51(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 51(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.1 mm. Referring to FIG. 51(c), the focus variationwith respect to the three different wavelengths (470 nm, 555 nm, 650 nm)in the whole field falls within ±0.1 mm. Additionally, the three curvespresenting different wavelengths are closed to each other, and theseclosed curves represents that the dispersion is improved.

Please refer to FIG. 51(d), the variation of the distortion aberrationof the optical imaging lens 13 is within +1.5%.

Therefore, the optical imaging lens 13 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 13 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 13is effectively shortened.

Reference is now made to FIGS. 54-57. FIG. 54 illustrates an examplecross-sectional view of an optical imaging lens 14 having six lenselements of the optical imaging lens according to a fourteenth exampleembodiment. FIG. 55 shows example charts of longitudinal sphericalaberration and other kinds of optical aberrations of the optical imaginglens 14 according to the twelfth embodiment. FIG. 56 shows an exampletable of optical data of each lens element of the optical imaging lens14 according to the twelfth example embodiment. FIG. 57 shows an exampletable of aspherical data of the optical imaging lens 14 according to thetwelfth example embodiment. The reference numbers labeled in the presentembodiment are similar to those in the first embodiment for the similarelements, but here the reference numbers are initialed with 14, forexample, reference number 1431 for labeling the object-side surface ofthe third lens element 1430, reference number 1432 for labeling theimage-side surface of the third lens element 1430, etc.

As shown in FIG. 54, the optical imaging lens 14 of the presentembodiment, in an order from an object side A1 to an image side A2 alongan optical axis, comprises an aperture stop 1400, a first lens element1410, a second lens element 1420, a third lens element 1430, a fourthlens element 1440, a fifth lens element 1450 and a sixth lens element1460.

The differences between the fourteenth embodiment and the firstembodiment are the radius of curvature and thickness of each lenselement, the distance of each air gap, back focal length, theconfiguration of the positive/negative refracting power of the fourthlens element 1440, and the configuration of the concave/convex shape ofthe image-side surfaces 1422, 1432, but the configuration of thepositive/negative refracting power of the first, second, third, fifthand sixth lens elements 1410, 1420, 1430, 1450, 1460 and configurationof the concave/convex shape of surfaces, comprising the object-sidesurfaces 1411, 1421, 1431, 1441, 1451, 1461 facing to the object side A1and the image-side surfaces 1412, 1442, 1452, 1462 facing to the imageside A2, are similar to those in the first embodiment. Here, for clearlyshowing the drawings of the present embodiment, only the surface shapeswhich are different from that in the first embodiment are labeled.Specifically, the fourth lens element 1440 has positive refractingpower, the image-side surface 1422 of the second lens element 1420comprises a concave portion 14221 in a vicinity of the optical axis anda convex portion 14222 in a vicinity of a periphery of the second lenselement 1420; the image-side surface 1432 of the third lens element 1430is a convex surface comprising a convex portion 14321 in a vicinity ofthe optical axis and a convex portion 14322 in a vicinity of a peripheryof the third lens element 1430.

FIG. 56 depicts the optical characteristics of each lens elements in theoptical imaging lens 14 of the present embodiment, and please refer toFIG. 58 for the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34 and ALT/G34 of the present embodiment.

The distance from the object-side surface 1411 of the first lens element1410 to the image plane 1480 along the optical axis is 5.431 mm and thelength of the optical imaging lens 14 is shortened compared withconventional optical imaging lenses. Thus, the optical imaging lens 14is capable to provide excellent imaging quality for smaller sized mobiledevices.

FIG. 55(a) shows the longitudinal spherical aberration. From thevertical deviation of each curve shown in FIG. 55(a), the offset of theoff-axis light relative to the image point is within ±0.03 mm.Furthermore, the three curves having different wavelengths are closed toeach other, and this situation represents that off-axis light withrespect to these wavelengths is focused around an image point, and theaberration can be improved obviously.

FIGS. 55(b) and 55(c) respectively show the astigmatism aberration inthe sagittal direction and astigmatism aberration in the tangentialdirection. Referring to FIG. 55(b), the focus variation with respect tothe three different wavelengths (470 nm, 555 nm, 650 nm) in the wholefield falls within ±0.08 mm. Referring to FIG. 55(c), the focusvariation with respect to the three different wavelengths (470 nm, 555nm, 650 nm) in the whole field falls within ±0.12 mm. Additionally, thethree curves presenting different wavelengths are closed to each other,and these closed curves represents that the dispersion is improved.

Please refer to FIG. 55(d), the variation of the distortion aberrationof the optical imaging lens 14 is within ±1.2%.

Therefore, the optical imaging lens 14 of the present embodiment showsgreat characteristics in the longitudinal spherical aberration,astigmatism in the sagittal direction, astigmatism in the tangentialdirection, and distortion aberration. According to above illustration,the optical imaging lens 14 of the example embodiment indeed achievesgreat optical performance and the length of the optical imaging lens 14is effectively shortened.

Please refer to FIG. 58, which shows the values of T1

G12

T2

G23

T3

G34

T4

G45

T5

G56

T6

G6F

TF

GFP

EFL

ALT

AAG

BFL

TTL

T4/G45

T3/T2

T4/G56

ALT/G56

T1/G56

T3/T6

T3/G34

EFL/G56

G23/G56

T3/G56

T1/G34

G45/T5

T4/G34

BFL/T4

T5/G34

G23/T2

G23/G34

EFL/G34

and ALT/G34 of all fourteenth embodiments, and it is clear that theoptical imaging lens of the present invention satisfy the Equations(1)˜(19).

Reference is now made to FIG. 59, which illustrates an examplestructural view of a first embodiment of mobile device 20 applying anaforesaid optical imaging lens. The mobile device 20 comprises a housing21 and a photography module 22 positioned in the housing 21. Examples ofthe mobile device 20 may be, but are not limited to, a mobile phone, acamera, a tablet computer, a personal digital assistant (PDA), etc.

As shown in FIG. 59, the photography module 22 has an optical imaginglens with fixed focal length, wherein the photography module 22 maycomprise the aforesaid optical imaging lens with six lens elements. Forexample, photography module 22 comprises the optical imaging lens 1 ofthe first embodiment, a lens barrel 23 for positioning the opticalimaging lens 1, a module housing unit 24 for positioning the lens barrel23, a substrate 182 for positioning the module housing unit 24, and animage sensor 181 which is positioned at an image side of the opticalimaging lens 1. The image plane 180 is formed on the image sensor 181.

In some other example embodiments, the structure of the filtering unit170 may be omitted. In some example embodiments, the housing 21, thelens barrel 23, and/or the module housing unit 24 may be integrated intoa single component or assembled by multiple components. In some exampleembodiments, the image sensor 181 used in the present embodiment isdirectly attached to a substrate 182 in the form of a chip on board(COB) package, and such package is different from traditional chip scalepackages (CSP) since COB package does not require a cover glass beforethe image sensor 181 in the optical imaging lens 1. Aforesaid exemplaryembodiments are not limited to this package type and could beselectively incorporated in other described embodiments.

The six lens elements 110, 120, 130, 140, 150, 160 are positioned in thelens barrel 23 in the way of separated by an air gap between any twoadjacent lens elements.

The module housing unit 24 comprises a lens backseat 2401 forpositioning the lens barrel 23 and an image sensor base 2406 positionedbetween the lens backseat 2401 and the image sensor 181. The lens barrel23 and the lens backseat 2401 are positioned along a same axis I-I′, andthe lens backseat 2401 is positioned at the inside of the lens barrel23. The image sensor base 2406 is exemplarily close to the lens backseat2401 here. The image sensor base 2406 could be optionally omitted insome other embodiments of the present invention.

Because the length of the optical imaging lens 1 is merely 5.860 mm, thesize of the mobile device 20 may be quite small. Therefore, theembodiments described herein meet the market demand for smaller sizedproduct designs.

Reference is now made to FIG. 60, which shows another structural view ofa second embodiment of mobile device 20′ applying the aforesaid opticalimaging lens 1. One difference between the mobile device 20′ and themobile device 20 may be the lens backseat 2401 comprising a first seatunit 2402, a second seat unit 2403, a coil 2404 and a magnetic unit2405. The first seat unit 2402 is close to the outside of the lensbarrel 23, and positioned along an axis I-I′, and the second seat unit2403 is around the outside of the first seat unit 2402 and positionedalong with the axis I-I′. The coil 2404 is positioned between theoutside of the first seat unit 2402 and the inside of the second seatunit 2403. The magnetic unit 2405 is positioned between the outside ofthe coil 2404 and the inside of the second seat unit 2403.

The lens barrel 23 and the optical imaging lens 1 positioned therein aredriven by the first seat unit 2402 for moving along the axis I-I′. Therest structure of the mobile device 20′ is similar to the mobile device20.

Similarly, because the length of the optical imaging lens 1 is 5.860 mm,is shortened, the mobile device 20′ may be designed with a smaller sizeand meanwhile good optical performance is still provided. Therefore, thepresent embodiment meets the demand of small sized product design andthe request of the market.

According to above illustration, it is clear that the mobile device andthe optical imaging lens thereof in example embodiments, throughcontrolling the detail structure of the lens elements and an inequality,the length of the optical imaging lens is effectively shortened andmeanwhile good optical characteristics are still provided.

While various embodiments in accordance with the disclosed principlesbeen described above, it should be understood that they are presented byway of example only, and are not limiting. Thus, the breadth and scopeof exemplary embodiment(s) should not be limited by any of theabove-described embodiments, but should be defined only in accordancewith the claims and their equivalents issuing from this disclosure.Furthermore, the above advantages and features are provided in describedembodiments, but shall not limit the application of such issued claimsto processes and structures accomplishing any or all of the aboveadvantages.

Additionally, the section headings herein are provided for consistencywith the suggestions under 37 C.F.R. 1.77 or otherwise to provideorganizational cues. These headings shall not limit or characterize theinvention(s) set out in any claims that may issue from this disclosure.Specifically, a description of a technology in the “Background” is notto be construed as an admission that technology is prior art to anyinvention(s) in this disclosure. Furthermore, any reference in thisdisclosure to “invention” in the singular should not be used to arguethat there is only a single point of novelty in this disclosure.Multiple inventions may be set forth according to the limitations of themultiple claims issuing from this disclosure, and such claimsaccordingly define the invention(s), and their equivalents, that areprotected thereby. In all instances, the scope of such claims shall beconsidered on their own merits in light of this disclosure, but shouldnot be constrained by the headings herein.

What is claimed is:
 1. An optical imaging lens, sequentially from anobject side to an image side along an optical axis, comprising anaperture stop, first, second, third, fourth, fifth and sixth lenselements, each of said first, second, third, fourth, fifth and sixthlens elements having refracting power, an object-side surface facingtoward the object side and an image-side surface facing toward the imageside and a central thickness defined along the optical axis, wherein:said first lens element has positive refracting power, said image-sidesurface of said first lens comprises a convex portion in a vicinity ofthe optical axis; said second lens element is constructed by plasticmaterial; said image-side surface of said third lens element comprises aconvex portion in a vicinity of the optical axis; said image-sidesurface of said fourth lens element comprises a convex portion in avicinity of the optical axis; said object-side surface of said fifthlens element comprises a concave portion in a vicinity of the opticalaxis; said image-side surface of said sixth lens element which isconstructed by plastic material comprises a concave portion in avicinity of the optical axis; the central thickness of said fourth lenselement is represented by T4, an air gap between said fourth lenselement and said fifth lens element along the optical axis isrepresented by G45, and T4 and G45 satisfy the equation: T4/G45≦2.8;said optical imaging lens comprises no other lenses having refractingpower beyond said six lens element; wherein an air gap between saidsecond lens element and said third lens element along the optical axisis represented by G23, an air gap between said fifth lens element andsaid sixth lens element along the optical axis is represented by G56,and G23 and G56 satisfy the equation:G23/G56≦10.
 2. The optical imaging lens according to claim 1, whereinthe central thickness of said second lens element is represented by T2,the central thickness of said third lens element is represented by T3,and T2 and T3 satisfy the equation:T3/T2≦2.1.
 3. The optical imaging lens according to claim 2, wherein anair gap between said fifth lens element and said sixth lens elementalong the optical axis is represented by G56, and T4 and G56 satisfy theequation:T4/G56≦9.1.
 4. The optical imaging lens according to claim 2, wherein asum of the central thicknesses of all six lens elements is representedby ALT, an air gap between said fifth lens element and said sixth lenselement along the optical axis is represented by G56, and ALT and G56satisfy the equation:ALT/G56≦90.
 5. The optical imaging lens according to claim 1, whereinthe central thickness of said first lens element is represented by T1,an air gap between said fifth lens element and said sixth lens elementalong the optical axis is represented by G56, and T1 and G56 satisfy theequation:T1/G56≦20.5.
 6. The optical imaging lens according to claim 5, whereinthe central thickness of said third lens element is represented by T3,the central thickness of said sixth lens element is represented by T6,and T3 and T6 satisfy the equation:T3/T6≦1.22.
 7. The optical imaging lens according to claim 1, whereinthe central thickness of said third lens element is represented by T3,an air gap between said third lens element and said fourth lens elementalong the optical axis is represented by G34, and T4 and G34 satisfy theequation:T3/G34≦5.5.
 8. The optical imaging lens according to claim 7, wherein aneffective focal length of said optical imaging lens is represented byEFL, an air gap between said fifth lens element and said sixth lenselement along the optical axis is represented by G56, and EFL and G56satisfy the equation:EFL/G56≦150.
 9. The optical imaging lens according to claim 1, whereinthe central thickness of said third lens element is represented by T3,an air gap between said fifth lens element and said sixth lens elementalong the optical axis is represented by G56, and T3 and G56 satisfy theequation:T3/G56≦10.
 10. The optical imaging lens according to claim 9, whereinthe central thickness of said first lens element is represented by T1,an air gap between said third lens element and said fourth lens elementalong the optical axis is represented by G34, and T1 and G34 satisfy theequation:T1/G34≦5.0.
 11. The optical imaging lens according to claim 1, whereinthe central thickness of said fifth lens element is represented by T5,and T4 and G45 satisfy the equation:G45/T5≦1.4.
 12. The optical imaging lens according to claim 11, whereinan air gap between said third lens element and said fourth lens elementalong the optical axis is represented by G34, and T4 and G34 satisfy theequation:T4/G34≦2.8.
 13. The optical imaging lens according to claim 1, wherein aback focal length of said optical imaging lens, which is defined as thedistance from the image-side surface of said sixth lens element to theimage plane along the optical axis and represented by BFL, and BFL andT4 satisfy the equation:BFL/T4≦5.5.
 14. The optical imaging lens according to claim 13, whereinthe central thickness of said fifth lens element is represented by T5,an air gap between said third lens element and said fourth lens elementalong the optical axis is represented by G34, and T5 and G34 satisfy theequation:T5/G34≦5.
 15. The optical imaging lens according to claim 1, wherein anair gap between said second lens element and said third lens elementalong the optical axis is represented by G23, the central thickness ofsaid second lens element is represented by T2, and G23 and T2 satisfythe equation:G23/T2≦1.24.
 16. The optical imaging lens according to claim 1, whereinan air gap between said second lens element and said third lens elementalong the optical axis is represented by G23, an air gap between saidthird lens element and said fourth lens element along the optical axisis represented by G34, and G23 and G34 satisfy the equation:G23/G34≦2.3.
 17. The optical imaging lens according to claim 1, whereinan effective focal length of said optical imaging lens is represented byEFL, an air gap between said third lens element and said fourth lenselement along the optical axis is represented by G34, and EFL and G34satisfy the equation:EFL/G34≦30.
 18. The optical imaging lens according to claim 1, wherein asum of the central thicknesses of all six lens elements is representedby ALT, an air gap between said third lens element and said fourth lenselement along the optical axis is represented by G34, and ALT and G34satisfy the equation:ALT/G34≦18.
 19. A mobile device, comprising: a housing; and aphotography module positioned in said housing and comprising: an opticalimaging lens according to any one of claim 1; a lens barrel forpositioning said optical imaging lens; a module housing unit forpositioning said lens barrel; and an image sensor positioned at theimage side of said optical imaging lens.